Sanitizing ELF compat support, especially for triarch architectures:
* X32 handling cleaned up
* MIPS64 uses compat_binfmt_elf.c both for O32 and N32 now
* Kconfig side of things regularized
Eventually I hope to have compat_binfmt_elf.c killed, with
both native and compat built from fs/binfmt_elf.c, with -DELF_BITS={64,32}
passed by kbuild, but that's a separate story - not included here.
Sat in -next for the entire cycle, no problems reported...
The following changes since commit 698222457465ce343443be81c5512edda86e5914:
MIPS: Fix malformed NT_FILE and NT_SIGINFO in 32bit coredumps (2020-12-28 23:26:17 +0100)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.elf-compat
for you to fetch changes up to e565d89e4aa07e3f20ac5e8757b1da24b5878e69:
get rid of COMPAT_ELF_EXEC_PAGESIZE (2021-01-06 08:42:51 -0500)
----------------------------------------------------------------
Al Viro (14):
binfmt_elf: partially sanitize PRSTATUS_SIZE and SET_PR_FPVALID
elf_prstatus: collect the common part (everything before pr_reg) into a struct
[amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly
x32: make X32, !IA32_EMULATION setups able to execute x32 binaries
Merge remote-tracking branch 'mips/mips-fixes' into work.elf-compat
mips binfmt_elf*32.c: use elfcore-compat.h
mips: kill unused definitions in binfmt_elf[on]32.c
mips: KVM_GUEST makes no sense for 64bit builds...
mips compat: don't bother with ELF_ET_DYN_BASE
mips: don't bother with ELF_CORE_EFLAGS
mips compat: switch to compat_binfmt_elf.c
Kconfig: regularize selection of CONFIG_BINFMT_ELF
compat_binfmt_elf: don't bother with undef of ELF_ARCH
get rid of COMPAT_ELF_EXEC_PAGESIZE
arch/Kconfig | 3 +
arch/arm64/Kconfig | 1 -
arch/ia64/kernel/crash.c | 2 +-
arch/mips/Kconfig | 8 +-
arch/mips/include/asm/elf.h | 56 +++++---------
arch/mips/include/asm/elfcore-compat.h | 29 ++++++++
arch/mips/kernel/Makefile | 4 +-
arch/mips/kernel/binfmt_elfn32.c | 113 ----------------------------
arch/mips/kernel/binfmt_elfo32.c | 116 -----------------------------
arch/mips/kernel/scall64-n64.S | 2 +-
arch/parisc/Kconfig | 1 -
arch/powerpc/Kconfig | 1 -
arch/powerpc/platforms/powernv/opal-core.c | 6 +-
arch/s390/Kconfig | 1 -
arch/s390/kernel/crash_dump.c | 2 +-
arch/sparc/Kconfig | 1 -
arch/x86/Kconfig | 2 +-
arch/x86/include/asm/compat.h | 11 ---
arch/x86/include/asm/elf.h | 2 +-
arch/x86/include/asm/elfcore-compat.h | 31 ++++++++
fs/Kconfig.binfmt | 2 +-
fs/binfmt_elf.c | 21 +++---
fs/binfmt_elf_fdpic.c | 22 ++----
fs/compat_binfmt_elf.c | 7 +-
include/linux/elfcore-compat.h | 15 +++-
include/linux/elfcore.h | 7 +-
kernel/kexec_core.c | 2 +-
27 files changed, 129 insertions(+), 339 deletions(-)
create mode 100644 arch/mips/include/asm/elfcore-compat.h
delete mode 100644 arch/mips/kernel/binfmt_elfn32.c
delete mode 100644 arch/mips/kernel/binfmt_elfo32.c
create mode 100644 arch/x86/include/asm/elfcore-compat.h
